C / C++ / MFC Discussion Boards

VadRoz13-Apr-05 0:02

13-Apr-05 0:02

I have a problem with function RegEnumKeyEx in Windows XP. Variable
retCode obtain code 5 after first using function RegEnumKeyEx. Code
showed below

<br />
void CInstDlg::GetSubKeys(HKEY key, CString subStr, CStringArray &arr)<br />
{<br />
    HKEY     hKey;<br />
    DWORD    i, retCode, maxlen = MAX_PATH;<br />
    CHAR     achKey[MAX_PATH]; <br />
    FILETIME ftLastWriteTime;<br />
<br />
    retCode = RegOpenKeyEx(key, subStr, NULL, KEY_QUERY_VALUE, &hKey);<br />
<br />
    for (i = 0, retCode = ERROR_SUCCESS;<br />
            retCode == ERROR_SUCCESS; i++)<br />
    {<br />
	retCode = RegEnumKeyEx(hKey, i, achKey, &maxlen, NULL, NULL, NULL,   <br />
        &ftLastWriteTime);<br />
        maxlen = MAX_PATH;<br />
        if (retCode == ERROR_SUCCESS)<br />
		   arr.Add(achKey);<br />
    }<br />
<br />
	RegCloseKey(hKey);<br />
}<br />

VadimR

Re: RegEnumKeyEx and Windows XP

22491713-Apr-05 0:21

224917

13-Apr-05 0:21

The key must have been opened with the KEY_ENUMERATE_SUB_KEYS access right.

suhredayan
There is no spoon.

Re: RegEnumKeyEx and Windows XP

VadRoz13-Apr-05 1:46

VadRoz

13-Apr-05 1:46

Thank you very much

VadimR

Re: RegEnumKeyEx and Windows XP

22491713-Apr-05 1:54

224917

13-Apr-05 1:54

ne time

suhredayan
There is no spoon.

Different results using MT and MTd

Pablo Fraile12-Apr-05 23:41

Pablo Fraile

12-Apr-05 23:41

Hi all,

I'm using Visual C++.NET in a project involving image manipulation. The problem is that I'm getting different output using the MT or MTd Run-Time libraries. I've checked the inputs to the graphics functions (I can't check the functions itself because they're in a precompiled lib) and seem to be the same in both cases. Any suggestions on what's going on?

Thanks in advance.

Re: Different results using MT and MTd

Member 796598513-Apr-05 1:14

Member 7965985

13-Apr-05 1:14

Well.... VC++ uses different floating point libraries for the debug and release version. So you get different results. The main change is in precision.
Try applying breakpoints in release mode and check if you are getting the same result as in debug mode.

Re: Different results using MT and MTd

Pablo Fraile13-Apr-05 1:23

Pablo Fraile

13-Apr-05 1:23

Anshul Solanki wrote:
VC++ uses different floating point libraries for the debug and release version.

OK, then I need to restate the question: could you point me to somewhere listing the main differences between debug and release libraries? Something I forgot to mention is that according to the theoretical results, the correct output is the one in debug mode. Otherwise I wouldn't be so concerned. Thanks again.

overloading [ ] [ ] operator

swati2412-Apr-05 23:34

swati24

12-Apr-05 23:34

Hi
I want to overload [] [] operator for a Matrix class that I am writing. I think one of the solutions will overloading the operators incrementally. If someone has done this in past or has more ideas, please drop a line or bits of code.

generally, a templated version of overloading [ ] goes like:

e.g. template <class E> E& CMatrix<E>::operator [] (int index) const
{
return CMatrix::foo<E>[index];
}

Thanks

Re: overloading [ ] [ ] operator

toxcct13-Apr-05 0:46

toxcct

13-Apr-05 0:46

first of all, operator[][] doesn't exist in C++ !!!

what happens when you create a multi-dimensional array is in fact creating an array of arrays... d'you follow me ?! Wink | ;)

TOXCCT >>> GEII power
[toxcct][VisualCalc]

Re: overloading [ ] [ ] operator

Cedric Moonen13-Apr-05 1:09

Cedric Moonen

13-Apr-05 1:09

I think (but I'm really not sure, it's too long that I didn't do that Wink | ;)

) that you will need to define a new class that is the one dimension array (like you mentionned there, CMatrix::foo). And then inside this class, override the [] operator also. But, for the CMatrix operator, it will not return the E template but a foo class... (and then on this return you apply the second operator[] from foo class that returns your E template element).
Ok, but as I said I'm not sure anymore...

But another suggestion: why don't you use the STL vector class ? It is a template class that can manage one dimensionnal arrays. Then you make a vector of vector and you have your matrix. The advantage is that you don't need to write it all again, that it has been tested by thousands of people, ...

Re: overloading [ ] [ ] operator

Axter26-Apr-05 17:49

Axter

26-Apr-05 17:49

There is no such thing as an operator[][].
However, you can simulate very easy.
All you have to do is create an operator[] that returns a pointer to your type.
inline T* operator[](int i) {return (m_data + (m_col*i));}

Here's a working example:
template < class T>
class dynamic_2d_array
{
public:
dynamic_2d_array(int row, int col):m_row(row),m_col(col), m_data((row!=0&&col!=0)?new T[row*col]:NULL){}
dynamic_2d_array(const dynamic_2d_array&src):m_row(src.m_row),m_col(src.m_col), m_data((src.m_row!=0&&src.m_col!=0)?new T[src.m_row*src.m_col]:NULL){
for(int r=0;r<m_row;++r)for(int c="0;c<m_col;++c)" (*this)[r][c]="src[r][c];
" }
="" ~dynamic_2d_array(){if(m_data)="" delete="" []m_data;}
="" inline="" t*="" operator[](int="" i)="" {return="" (m_data="" +="" (m_col*i));}
="" t="" const*const="" const="" (m_col*i));}
protected:
="" dynamic_2d_array&="" operator="(const" dynamic_2d_array&);
private:
="" int="" m_row;
="" m_col;
="" m_data;=""
};

you="" can="" download="" it="" from="" following="" link:
<a="" href="http://code.axter.com/dynamic_2d_array.h" rel="nofollow">http://code.axter.com/dynamic_2d_array.h[^]

Top ten member of C++ Expert Exchange.
http://www.experts-exchange.com/Cplusplus

Problems with Custom controls in separate resource dll

Gemini_II12-Apr-05 23:27

Gemini_II

12-Apr-05 23:27

I have got the following problem.

I have a put my resources in a DLL that is connected to my application at runtime.
Everything works fine, but as soon I put a custom control (p.e. Chris Maunder's Gridcontrol) in a dialog, that dialog won't come up.

Has anybody also encountered this problem and solved it?

Re: Problems with Custom controls in separate resource dll

Member 796598513-Apr-05 1:10

Member 7965985

13-Apr-05 1:10

Make your Dll an MFC extension dll.

Problem in loading metafile in VC++ MFC

Sud_8312-Apr-05 23:16

Sud_83

12-Apr-05 23:16

Ours is an application using VC++ MFC. We need to draw an image in the window and this input image from the customer will be in .cgm format. Since windows meta file(wmf) format is microsoft supported one, we convert .cgm to .wmf file and import to our application. We load this wmf image using Loadpicture and render functions. We are using LPPICTURE object for drawing. The image clarity is not appreciable since it is not smooth. But if the same wmf image is inserted in MSEXCEL, it is smooth.So for this scenario, we need your inputs on

a) Is any other microsoft supported object(like LPPICTURE) available to draw the image?

b) Is any 3rd party tool available to draw the wmf file with smooth?

c) Is it possible to load .cgm file directly in VC++ MFC application?

Re: Problem in loading metafile in VC++ MFC

C^hris L^osinger13-Apr-05 3:18

C^hris L^osinger

13-Apr-05 3:18

Sud_83 wrote:
any other microsoft supported object(like LPPICTURE) available to draw the image?

see GetEnhMetaFileHeader and PlayEnhMetaFile

Image Toolkits | Image Processing | Cleek

Problem with CListCtrl

Neeranjan12-Apr-05 23:09

Neeranjan

12-Apr-05 23:09

Hi,

I have an application (in VC++ 6.0) wherein it displays the images in ListView. So the application starts displaying the images from the Top left corner (0,0).
Now I have added the manifest file (to give XP look to application) in applicatoin resource successfully. (as outlined in the below mentioned link http://www.codeguru.com/Cpp/controls/controls/article.php/c5227/[^])
The application is having the XP look but the images are displayed from the Bottom left corner.

Question:How to set the origin of the ListCtrl to top left corner (0,0) so that the images are displayed from the top left corner (0,0) ?

Thanks & Regards,
Neeraj

Thanks & Regards,
Neeraj

Thanks & Regards,
Neeraj

How to send a message from a object to its parents?

thanh-hai.bui12-Apr-05 22:30

thanh-hai.bui

12-Apr-05 22:30

hi!

For example, i have a class CMyRichEditCtrl that extends CWnd. In this class, i declare a CRichEditCtrl membre.

In CMyRichEditCtrl, i've declared a function :

BOOL CEdataRichEdit::OnNotify(WPARAM wParam, LPARAM lParam, LRESULT* pResult)<br />
{<br />
  if (wParam == IDC_RICH)<br />
  {<br />
    // Here, i want to send this function, that means OnNotify to its parents (a Dialog) <big>(1)</big><br />
  }<br />
  return CWnd::OnNotify(wParam, lParam, pResult);<br />
}

In my dialog (MyDialogDlg), i've some buttons, and OnNotify function too.

Question: I want to call a function (OnNotify for example) of MyDialogDlg in <big>(1)</big>? How can i do?

thanhks for all help!

hzocm

Re: How to send a message from a object to its parents?

Joel Holdsworth12-Apr-05 22:54

Joel Holdsworth

12-Apr-05 22:54

Hi again,
Still rumbling on with that old problem? What you are about to do here is not such a bad idea, but I found this in msdn which might help you more: TN062[^]

Joel Holdsworth

Wanna give me a job this summer?
Check out my online CV and project history[^]

Re: How to send a message from a object to its parents?

thanh-hai.bui13-Apr-05 0:50

thanh-hai.bui

13-Apr-05 0:50

thanks for your help!

the old problem is fixed. If fact, we must call SetEventMask.

i saw article TN062, but i don't know how to create a ON_NOTIFY_REFLECT with ClassWizard (or manual)?

Can u give me something more? For example : how to creat ON_NOTIFY_REFLECT, how dose that means its parameter?, and how to get it (parameters)?

thanks

hzocm

Re: How to send a message from a object to its parents?

ThatsAlok12-Apr-05 23:01

ThatsAlok

12-Apr-05 23:01

Try GetParent(..) Api

[Vote One Here, Complete my Survey....]

Alok Gupta
visit me at http://www.thisisalok.tk

"I ~~Think~~ Believe this Will Help"

Conversion to LONGLONG

fardak12-Apr-05 21:57

fardak

12-Apr-05 21:57

I have a CString mystring defined like this:
mystring="FFFFFFFFFFFFFFFF";//16 F
How can I convert programatically that to a LONLONG ?
Thanks for any help.

Re: Conversion to LONGLONG

Joel Holdsworth12-Apr-05 22:17

Joel Holdsworth

12-Apr-05 22:17

Good morning fardak. I've got some code for you here. Hopefully it will be less messed up than yesterday's effort:

LONGLONG result = 0;
int cursor = 0;
int length = _tcslen(mystring);

for(int i = 0; i < length; i++)
{
	result <<= 4;
	if(mystring[i] >= _T('0') && mystring[i] <= _T('9'))
		result |= (mystring[i] - _T('0')) & 0x0F;
	else if(mystring[i] >= _T('a') && mystring[i] <= _T('f'))
		result |= (mystring[i] - _T('a') + 10) & 0x0F;
	else if(mystring[i] >= _T('A') && mystring[i] <= _T('F'))
		result |= (mystring[i] - _T('A') + 10) & 0x0F;
	else if(mystring[i] != _T(' ') &&
		mystring[i] != _T('\t'))	// Any characters that you want to ignore
		break;				// Otherwise stop scanning if we encounter any non-hex characters
	cursor++;
	if(cursor >= sizeof(result) * 2)	// Stop scanning when we reach the require number of digits
		break;				// You could have an "overflow" error message sent here, if you want
}

Hope this helps you.

Joel Holdsworth

Wanna give me a job this summer?
Check out my online CV and project history[^]

Re: Conversion to LONGLONG

fardak12-Apr-05 22:34

fardak

12-Apr-05 22:34

Good morning Joel,and thanks for your prompt answer.
My God I am not that fast programming!
I'll study your code try it and get back to you as soon as I can.
Have a nice day.

Re: Conversion to LONGLONG

Joel Holdsworth12-Apr-05 22:44

Joel Holdsworth

12-Apr-05 22:44

Just noticed one minor bug. The code should be like this:

LONGLONG result = 0;
int cursor = 0;
int length = _tcslen(mystring);

for(int i = 0; i < length; i++)
{
	result <<= 4;
	if(mystring[i] >= _T('0') && mystring[i] <= _T('9'))
		result |= (mystring[i] - _T('0'));
	else if(mystring[i] >= _T('a') && mystring[i] <= _T('f'))
		result |= (mystring[i] - _T('a') + 10);
	else if(mystring[i] >= _T('A') && mystring[i] <= _T('F'))
		result |= (mystring[i] - _T('A') + 10);
	else if(mystring[i] == _T(' ') ||
		mystring[i] == _T('\t'))	// Any characters that you want to ignore
		continue;				// Otherwise stop scanning if we encounter any non-hex characters
	else break;
	cursor++;
	if(cursor >= sizeof(result) * 2)	// Stop scanning when we reach the require number of digits
		break;				// You could have an "overflow" error message sent here, if you want
}

The reason I'm making all these mistakes, is that i've got no compiler to test this stuff on right now!

Joel Holdsworth

Wanna give me a job this summer?
Check out my online CV and project history[^]

Re: Conversion to LONGLONG

fardak12-Apr-05 23:27

fardak

12-Apr-05 23:27

Thanks.
I did not study the code yet,but both codes compile without error and both give the same result.
I put the code in a function and added these three lines to se the result.
///////////////////////
CString message;
message.Format("%16x",result);
SetDlgItemText(IDC_MYRESULT,message);//Edit trol
///////////////////////////////////
The string I gave is "fffffffffffffff" //16 f
The answer I've got is :
ffffffff //8f !!
So it is as if the high "ffffffff" are ignored !
Maybe the loop should be extended ??

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